Mortadella Pasta Salad

I have a certain amount of ambivalance about pasta salads, but I find that my emotional seesaw tips ever more in favor of them. The truth[ is, I used to be scathing. But finding them so popular with my children makes me see their virtue. This one is a favourite at home, though none of my finickity lot want the green bits; if you suffer the same irritations and constraints, take out the parsley and leave it for adults to sprinkle optionally.]